Improvement in lifting-jacks



C. D. AYLSWURTH.

Lifting-Jacks.

Patented May 5., 1874r WITNESSES 1%/ v ATTonNEYs.

AM//mUMMMPl/M can! )flusso/:wis Manns) NITED STATES PATENT OFFICE.

CHARLES D. AYLSWORTH, OF AFTON,NEW YORK.

IMPROVEMENT IN LlFTlNG-JACKS.

Specific ation forming part of Letters Patent No. 150,458, dated May 5, 1874; application filed April 11K, 1874.

To all 'whom it may concern:

Be it known that I, CHAnLEs D. AvLs- WORTH, of Afton, in the county of Ghenango and State of New York, have invented a new and useful Improvement in Wagon-Jacks, of which the following is a specification:

This invention relates to a new and useful improvement in jacks for raising the axles and wheels of wagons, carriages, and other wheeled vehicles; and consists in the construction and larrangement of parts hereinafter described.

In the accompanying drawing, Figure lis a side elevation, showing the construction of the jack, and the manner of its application. Fig. 2 is a front view of the same.

Similar letters of reference indicate corresponding parts.

A is a slide, which works in a slotted bar, B, and is adjusted, as to height, by means of the stops or notches C, which lit into a corresponding notch in the slotted bar B, ,as seen at D. rEhe notches in both are lieveling, so that the tendency is to cling together when the jack is loaded. The slide is guided and governed by the pin E, which passes through the slot of the bar B, and through the slot F in the slide A, as shown in Fig. l. Gr is the lifting-lever. rllhis lever is connected, by the jointpin H, to the lower forked end of the bar B.

In operating with the jack, it will be seen that the lever rests upon the ground, and that its long` end is lifted, and the jack raised in raising the axle of the wagon, the fulcrum being the floor or surface ofthe ground.

When the lever is turned up to the position seen in dotted lines, the weight is directly over the lower end of the lever, and the latter, with the jack, is maintained in an upright position. In bringing the lever to this position, its short end and bar B act as the members of a togglejoint, and with constantly-increasing power, until the bearing-points are in line with each other, as seen in the drawing.

By this mode I am enabled to employ a much 'longer lever, with a corresponding increase ot' power, than I could were I to apply the power in the ordinary manner.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A wagon-jack, consisting of the slide A, bar B, and lifting lever G, combined to operate substantially as set forth. v

y CHARLES D. AYLSWORTH. 

